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1. Carol owns Virgil’s Electrical Corporation. She needs an electrician and is placing a nine line classified ad. The cost of an ad that is x lines long is given by the following piecewise function. Find the cost of a nine-line ad. 28 when 3 ( ) 28 4( 3) when 3 x c

Sagot :

MrRoyal

Answer:

The cost of 9 line ad is #52

Explanation:

Given

[tex]f(x) = 28[/tex] --- [tex]x \le 3[/tex]

[tex]f(x) = 28 + 4(x - 3)[/tex] --- [tex]x > 3[/tex]

Required

The cost of a 9 line ad

This means that:

[tex]x = 9[/tex]

To calculate the cost, we make use of:

[tex]f(x) = 28 + 4(x - 3)[/tex] --- [tex]x > 3[/tex]

Because [tex]9 > 3[/tex]

So, we have:

[tex]f(x) = 28 + 4(x - 3)[/tex]

[tex]f(9) = 28 + 4 * (9 - 3)[/tex]

[tex]f(9) = 28 + 4 * 6[/tex]

[tex]f(9) = 28 + 24[/tex]

[tex]f(9) = 52[/tex]

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